@technobuddha/library/isLeapYear/isLeapYear.mjs

A large library of useful functions

import isNumber from 'lodash/isNumber';
/**
 * Determine if a year is a leap year
 *
 * @param input A date, or a year number
 * @param __namedParameters see {@link Options}
 * @returns true, if the specified year is a leap year
 */
export function isLeapYear(input, { UTC = false } = {}) {
    const year = isNumber(input) ? input : UTC ? input.getUTCFullYear() : input.getFullYear();
    return year % 4 === 0 && (year % 100 !== 0 || year % 400 === 0);
}
export default isLeapYear;